Split hand/foot malformation due to chromosome 7q aberrations(SHFM1): additional support for functional haploinsufficiency as the causative mechanism

Anneke T. van Silfhout, Peter C. van den Akker, Trijnie Dijkhuizen, Joke B. G. M. Verheij, Maran J. W. Olderode-Berends, Klaas Kok, Birgit Sikkema-Raddatz, Conny M. A. van Ravenswaaij-Arts*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

29 Citations (Scopus)

Abstract

We report on three patients with split hand/foot malformation type 1 (SHFM1). We detected a deletion in two patients and an inversion in the third, all involving chromosome 7q21q22. We performed conventional chromosomal analysis, array comparative genomic hybridization and fluorescence in situ hybridization. Both deletions included the known genes associated with SHFM1 (DLX5, DLX6 and DSS1), whereas in the third patient one of the inversion break points was located just centromeric to these genes. These observations confirm that haploinsufficiency due to either a simultaneous deletion of these genes or combined downregulation of gene expression due to a disruption in the region between these genes and a control element could be the cause of the syndrome. We review previously reported studies that support this hypothetical mechanism. European Journal of Human Genetics (2009) 17, 1432-1438; doi:10.1038/ejhg.2009.72; published online 29 April 2009

Original languageEnglish
Pages (from-to)1432-1438
Number of pages7
JournalEuropean Journal of Human Genetics
Volume17
Issue number11
DOIs
Publication statusPublished - Nov-2009

Keywords

  • split hand/foot malformation (SHFM)
  • chromosome 7q21q22
  • DLX5
  • DLX6
  • DSS1
  • HAND FOOT MALFORMATION
  • LIMB DEVELOPMENT
  • CANDIDATE GENE
  • P63 GENE
  • LOCUS
  • EXPRESSION
  • REARRANGEMENT
  • FAMILY
  • DLX5
  • MUTATIONS

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